This is a gorgeous UK size 12 Mansfield (Frank Russell designer was known as the 'King of Coats') jacket in red cashmere and wool fabric in immaculate condition from the 1980s. 
 
Mansfield was a high quality brand in exclusive dept stores such as Harrods  Selfridges & Harvey NIchols, and favoured by Royalty like Lady Diana. 
 
This has an equestrian inspired feel to it and has a lovely little half belt with pleats. Pleats also on the front side bust area and a flattering fitted style. The faux fur collar is of very high quality dense thread count so is much better than the majority of faux fur today, very soft and glossy with no signs of wear. Gold buttons.
 
I'm a size 8 so it's big for me but if you are a UK 12 it's going to look fab on you. 
You cannot buy quality like this any more anywhere in high st stores. 
While it's vintage, it can look very contemporary with long boots and accessories as you can see. Great for the races, smart work wear or a day's shopping or evening wear.